ogbanje
What does ogbanje mean?
In Igbo cosmology, an ọgbanje is a spirit-child believed to die young and be reborn to the same mother repeatedly, tormenting the family — a serious, real spiritual belief (explored in literature such as Akwaeke Emezi's 'Freshwater'). In casual modern slang, the word gets stretched loosely to describe someone unpredictable, dramatic, or hard to control, without the original spiritual weight.
Origin
A genuine, deeply-rooted Igbo spiritual belief concept — not originally slang — referring to a reincarnating spirit-child. Its casual use in modern speech to mean 'unpredictable/chaotic person' is a real but much lighter figurative stretch of the original cultural concept; it is presented here with that context intact rather than reduced to a punchline.